COMPARATIVE ANALYSES OF BACTERIAL BIOBURDEN AND THE ANTIBIOTIC SUSCEPTIBILITIES OF SELECTED BACTERIA FROM FAECAL DROPPINGS OF COMMERCIAL AND FREE-RANGE CHICKENS, SAMARU, ZARIA
COMPARATIVE ANALYSES OF BACTERIAL BIOBURDEN AND THE ANTIBIOTIC SUSCEPTIBILITIES OF SELECTED BACTERIA FROM FAECAL DROPPINGS OF COMMERCIAL AND FREE-RANGE CHICKENS, SAMARU, ZARIA
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Date
2014-07
Authors
INABO, Hilda
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Abstract
The widespread use of antibiotics against bacterial diseases in the poultry industry has
been associated with the development of antibiotic resistance in pathogenic bacteria. This
poses a threat to the public worldwide since they are in contact directly when handling
animals and indirectly through food. The purpose of this study was to determine the
bacterial load, prevalence and antibiotic susceptibilities of Escherichia coli, Salmonella sp.,
Staphylococcus aureus and Enterococcus sp. Faecal droppings were randomly taken from
one hundred (100) broilers and one hundred (100) free-range (local) chickens. The inocula
were cultured on various media and incubated for 24-48 hours at 370C for identification.
The pure isolates were subjected to antibiotic susceptibility tests using the disc diffusion
technique. It was established that there was no significant difference between the total plate
counts of faecal droppings from commercial and free-range chickens. The comparison of
the antibiotic susceptibilities of the isolates from commercial and free-range chickens
showed no significant difference statistically except in streptomycin where S. aureus from
free-range chickens were more susceptible than those from commercial chickens. High
susceptibility to ciprofloxacin, gentamicin, chloramphenicol and high resistance to
cloxacillin, cotrimoxazole and tetracycline by the isolates were observed. The source of
antibiotic resistance may not necessarily be originating from the feeds, but from the
immediate environment of the chickens. This may be as a result of misuse of antibiotics
during treatment and control of diseases affecting chicken and other domesticated animals
Description
A THESIS SUBMITTED TO THE POST-GRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA,
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD
OF MASTER OF SCIENCE IN MICROBIOLOGY
DEPARTMENT OF MICROBIOLOGY,
FACULTY OF SCIENCE,
AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA.
JULY, 2014
Keywords
COMPARATIVE,, ANALYSES,, BACTERIAL,, BIOBURDEN,, ANTIBIOTIC,, SUSCEPTIBILITIES,, FAECAL,, DROPPINGS,, COMMERCIAL,, FREE-RANGE,, CHICKENS,